2014 Camaro, has 84,000 miles on it, automatic. Recently I’ve noticed with summer coming in that my car isn’t blowing any cold air. I’ve refilled the ac & that didn’t work. I made sure I had coolant. I plugged in a code reader & found no codes. I’m left to assume it’s either my thermostat or my door actuator, but I’m really not too sure. Also my coolant gage isn’t going to the middle. After I turn the car on & it’s running for a while the needle stops between the first mark & middle mark. I don’t know if that means anything regarding operating temperature & blowing cold air but I’m at a lose & i want to make sure what I need before I even think about taking it to my dealership.